I have Adobe Acrobat version 1.6.65 on Mac OS 10.6.8.
It's the only PDF viewer that can open and interact with all types of PDF content, including forms and multimedia. About: Adobe Acrobat Reader DC software is the free global standard for reliably viewing, printing, and commenting on PDF documents. Additional Requirements macOS 10.6 - 10.13.
Download Adobe Acrobat Reader DC for Mac to view & print PDF files. For step-by-step instructions, see Install Adobe Acrobat Reader DC on. If you're running Mac OS X 10.9 or later, install the latest version of Reader. First you download the installation package, and then you install Adobe Reader from that package file. Installing Adobe Reader is a two-step process.